MD Bookmarks: Pull context menu into separate element

chrome/test/data/webui/md_bookmarks/md_bookmarks_browsertest.js

Index: chrome/test/data/webui/md_bookmarks/md_bookmarks_browsertest.js
diff --git a/chrome/test/data/webui/md_bookmarks/md_bookmarks_browsertest.js b/chrome/test/data/webui/md_bookmarks/md_bookmarks_browsertest.js
index a78e933e5ffae9af4fd314b35b1001ce3d435c45..fa3bd214f004b12d2269ce85a500f0699d795207 100644
--- a/chrome/test/data/webui/md_bookmarks/md_bookmarks_browsertest.js
+++ b/chrome/test/data/webui/md_bookmarks/md_bookmarks_browsertest.js
@@ -55,6 +55,20 @@ TEST_F('MaterialBookmarksAppTest', 'All', function() {
   mocha.run();
 });
 
+function MaterialBookmarksCommandManagerTest() {}
+
+MaterialBookmarksCommandManagerTest.prototype = {
+  __proto__: MaterialBookmarksBrowserTest.prototype,
+
+  extraLibraries: MaterialBookmarksBrowserTest.prototype.extraLibraries.concat([
+    'command_manager_test.js',
+  ]),
+};
+
+TEST_F('MaterialBookmarksCommandManagerTest', 'All', function() {
+  mocha.run();
+});
+
 function MaterialBookmarksDNDManagerTest() {}
 
 MaterialBookmarksDNDManagerTest.prototype = {